Repetitive absorptive thresholding optical quantizer
    1.
    发明授权
    Repetitive absorptive thresholding optical quantizer 失效
    重复吸收阈值光学量化器

    公开(公告)号:US6160504A

    公开(公告)日:2000-12-12

    申请号:US343733

    申请日:1999-06-30

    CPC分类号: G02F7/00 H03M1/1235 H03M1/38

    摘要: An optical quantizer (10) that employs a chain of optical thresholding devices (16) positioned in the propagation path of an optical input beam (12) to be quantized. Each optical thresholding device (16) saturates and turns transparent if the intensity of the optical beam (12) that impinges it is above a predetermined threshold level designed into the device (16). If the input beam (12) saturates the optical thresholding device (16), the device (16) outputs an indicator signal (22) identifying the saturation. The input beam (12) propagates through the optical thresholding device (16) with some attenuation caused by the saturation, and impinges subsequent optical thresholding devices (16) in the chain. Eventually, the attenuation of the input beam (12) caused by the multiple saturations will decrease the beam intensity below the threshold level of the next optical thresholding device (16). The number of indicator signals (22) gives an indication of the intensity of the input beam (12). The optical thresholding devices (16) can provide optical or electrical indicator signals (22) depending on the type of thresholding device (16) used.

    摘要翻译: 一种光量化器(10),其使用位于要被量化的光输入光束(12)的传播路径中的光阈值设备(16)链。 如果撞击它的光束(12)的强度高于设计到设备(16)中的预定阈值水平,则每个光阈值设备(16)饱和并变透明。 如果输入光束(12)饱和光学阈值设备(16),则设备(16)输出识别饱和度的指示符信号(22)。 输入光束(12)通过光阈值设备(16)以由饱和度引起的一些衰减传播,并且将后续光阈值设备(16)照射在链中。 最终,由多个饱和引起的输入光束(12)的衰减将使光束强度降低到下一个光阈值设备(16)的阈值电平以下。 指示信号(22)的数量给出了输入光束(12)的强度的指示。 光学阈值设备(16)可以根据所使用的阈值设备(16)的类型来提供光学或电子指示符信号(22)。

    Delayed pulse saturable absorber-based downward-folding optical A/D
    2.
    发明授权
    Delayed pulse saturable absorber-based downward-folding optical A/D 有权
    延迟脉冲可饱和吸收器的向下折叠光学A / D

    公开(公告)号:US06292119B1

    公开(公告)日:2001-09-18

    申请号:US09345295

    申请日:1999-06-30

    IPC分类号: H03M100

    CPC分类号: G02F7/00

    摘要: An optical analog-to-digital converter (10) that makes use of a downward-folding successive approximation conversion scheme that employs subtraction of optical signals. A pulsed optical signal (20) to be converted is applied as an input to each of a plurality of converter channels (12, 14, 16, 18), where each channel (12, 14, 16, 18) outputs one of the bits of the digital output of the converter (10). The input signal (20) to each channel (12, 14, 16, 18) is sent to a thresholding device (24, 40, 60, 80) that determines whether the intensity of the signal is greater than or less than a predetermined threshold value. The first channel thresholding device (24) compares the input signal (20) to a threshold value that is one-half of a known maximum intensity. Subsequent channel thresholding devices (40, 60, 80) compare the input signal to a threshold value that is one-half of the intensity used in the previous channel in a downward-folding scheme. If the intensity of the input signal (20) is greater than the threshold value in a particular channel (12, 14, 16, 18), then that threshold value is subtracted from the input signal (20) in each of the successive channels before being applied to the thresholding device (40, 60, 80) in that channel (14, 16, 18). The subtraction elements (38, 56, 58, 74, 76, 78) can be saturable absorbers or electro-absorption modules in a particular design. Additionally, the control signals from a particular channel (12, 14, 16, 18) to each of the successive channels to determine whether subtraction will occur can be provided by an optically controlled switch (30, 46, 66), such as a saturable absorber, or an electrically controlled switch, such as an electro-absorption module.

    摘要翻译: 一种光学模数转换器(10),其使用采用减法光信号的向下折叠逐次逼近转换方案。 将要转换的脉冲光信号(20)作为输入施加到多个转换器通道(12,14,16,18)中的每一个,其中每个通道(12,14,16,18)输出其中一个位 的转换器(10)的数字输出。 每个通道(12,14,16,18)的输入信号(20)被发送到阈值设备(24,40,60,80),其确定信号的强度是否大于或小于预定阈值 值。 第一信道阈值设备(24)将输入信号(20)与已知最大强度的二分之一的阈值进行比较。 随后的信道阈值设备(40,60,80)将输入信号与向下折叠方案中先前信道中使用的强度的一半的阈值进行比较。 如果输入信号(20)的强度大于特定通道(12,14,16,18)中的阈值,则在每个连续通道中的输入信号(20)中减去该阈值,之后 被施加到该通道(14,16,18)中的阈值设备(40,60,80)。 减法元件(38,56,58,74,76,78)可以是特定设计中的可饱和吸收器或电吸收模块。 另外,来自特定通道(12,14,16,18)到每个连续通道的控制信号可以由光控开关(30,46,66)提供,以确定是否发生减法,例如可饱和的 吸收器或电控开关,例如电吸收模块。

    Frequency modulation-based folding optical analog-to-digital converter
    4.
    发明授权
    Frequency modulation-based folding optical analog-to-digital converter 失效
    基于频率调制的折叠光学模数转换器

    公开(公告)号:US6064325A

    公开(公告)日:2000-05-16

    申请号:US133037

    申请日:1998-08-11

    IPC分类号: G02F7/00 H03M1/00

    CPC分类号: G02F7/00

    摘要: A frequency modulation-based optical analog-to-digital converter utilizes a downward-folding, successive approximation approach. A series of stages is utilized to generate bits in the digital signal. In each stage, complementary low and high bandpass filters collectively cover a bandpass frequency range from a low frequency to a high frequency. The high frequency filtered signal from the high bandpass filter is observed to obtain a bit in the digital word. By performing the folding operations in the frequency domain, the converter avoids the difficult task of optical power subtraction, relying instead on frequency down-conversions. The high frequency filtered signal passed by the high bandpass filter is then downconverted and added to the low pass filter signal to generate a modulated signal for the next stage.

    摘要翻译: 基于频率调制的光学模数转换器利用向下折叠的逐次近似方法。 利用一系列级来产生数字信号中的位。 在每个阶段,互补的低和高带通滤波器共同覆盖从低频到高频的带通频率范围。 观察到来自高带通滤波器的高频滤波信号以获得数字字中的位。 通过在频域执行折叠操作,转换器避免了光功率减法的困难任务,而是依靠降频转换。 然后,由高带通滤波器通过的高频滤波信号被下变频并加到低通滤波器信号中,以生成下一级的调制信号。

    Saturable absorber based optical inverter
    5.
    发明授权
    Saturable absorber based optical inverter 失效
    基于可饱和吸收体的光逆变器

    公开(公告)号:US6035079A

    公开(公告)日:2000-03-07

    申请号:US133032

    申请日:1998-08-11

    摘要: An optical inverter (10) that uses a saturable absorber (28) to distinguish between a logical one and a logical zero. A low power laser (18) generates an optical beam that is split into a first beam that propagates among a first beam path (24) and a second beam that propagates along a second beam path (26). The saturable absorber (28) is an optical switch that is positioned in the first beam path (24), and is switched from an opaque mode to a transparent mode when it receives an optical input signal. The first beam and the second beam are recombined as an optical output beam in an optical combiner (30). The first beam path (24) and the second beam path (26) have a length relative to each other such that the first and second beams are 180.degree. out of phase when they reach the optical combiner (30). Therefore, if the saturable absorber (28) is switched to the transparent mode, the first and second beams combine destructively and the optical output beam is dark, or a logical zero. When the saturable absorber (28) is in the opaque mode, the first beam is blocked so that the optical output beam is the second beam, providing a logical one. A second saturable absorber (34) can be provided to receive the optical output beam from the combiner (30) to absorb residual light when the output beam is dark. Additionally, an optical amplifier (36) can be provided to receive the optical output beam from the combiner (30) to amplify the optical output beam to a consistent, predetermined output level.

    摘要翻译: 一种光学逆变器(10),其使用可饱和吸收器(28)来区分逻辑1和逻辑零点。 低功率激光器(18)产生光束,其被分裂成在沿第二光束路径(26)传播的第一光束路径(24)和第二光束之间传播的第一光束。 可饱和吸收器(28)是位于第一光束路径(24)中的光学开关,当其接收到光学输入信号时,从不透明模式切换到透明模式。 第一光束和第二光束在光合成器(30)中被重新组合为光输出光束。 第一光束路径(24)和第二光束路径(26)具有相对于彼此的长度,使得当第一和第二光束到达光合成器(30)时,第一和第二光束相位相差180度。 因此,如果可饱和吸收器(28)切换到透明模式,则第一和第二光束相消合并且光输出光束变暗或逻辑零。 当可饱和吸收器(28)处于不透明模式时,第一光束被阻挡,使得光输出光束是第二光束,提供逻辑的。 可以提供第二可饱和吸收器(34)以在组合器(30)处接收光输出光束以在输出光束较暗时吸收残余光。 另外,可以提供光放大器(36)以从组合器(30)接收光输出光束,以将光输出光束放大到一致的预定输出电平。

    Upward-folding successive-approximation optical analog-to-digital
converter and method for performing conversion
    6.
    发明授权
    Upward-folding successive-approximation optical analog-to-digital converter and method for performing conversion 失效
    向上折叠逐次近似光学模数转换器和执行转换的方法

    公开(公告)号:US06121907A

    公开(公告)日:2000-09-19

    申请号:US133038

    申请日:1998-08-11

    IPC分类号: G02F7/00 H03M1/00

    CPC分类号: G02F7/00

    摘要: An optical analog-to-digital converter (10) which fully operates in the optical domain and utilizes an upward-folding successive approximation approach for conversion. The converter (10) includes a plurality of optical stages (14, 16, 18) where each stage (14, 16, 18) generates a digital bit. Each stage (14, 16, 18) includes an optical threshold switch (30, 56, 78) that sets the bit high when the switch (30, 56, 78) is closed. When a sample amplitude of the analog signal is compared to a threshold value and found to exceed the threshold value, the bit is set to "high" and the sample is passed directly onto the next stage (14, 16, 18). If the sample amplitude is found to be less than the threshold value, the bit is set to "low" and an intensity equal to the maximum signal intensity minus the threshold intensity is added to the sample amplitude. Each successive stage (14, 16, 18) compares the normalized signal sample to thresholds growing closer and closer to the maximum signal intensity. Multiple bits can be obtained by cascading stages.

    摘要翻译: 一种光学模拟 - 数字转换器(10),其在光学域中完全操作并且利用向上折叠的逐次逼近方法进行转换。 转换器(10)包括多个光学级(14,16,18),其中每个级(14,16,18)产生数字位。 每个级(14,16,18)包括一个光学阈值开关(30,56,78),当开关(30,56,78)关闭时,它将位置高。 当将模拟信号的采样幅度与阈值进行比较并发现超过阈值时,将该位设置为“高”,并将样本直接传递到下一级(14,16,18)。 如果发现样品振幅小于阈值,则该位被设置为“低”,并且将等于最大信号强度减去阈值强度的强度加到样本幅度上。 每个连续级(14,16,18)将归一化信号样本与越来越接近最大信号强度的阈值进行比较。 可以通过级联级获得多个位。

    Device for radiation shielding of wireless transmit/receive electronic equipment such as cellular telephone from close proximity direct line-of-sight electromagnetic fields
    7.
    发明授权
    Device for radiation shielding of wireless transmit/receive electronic equipment such as cellular telephone from close proximity direct line-of-sight electromagnetic fields 失效
    无线发射/接收电子设备如蜂窝电话的近距离直接视距电磁场的辐射屏蔽装置

    公开(公告)号:US06603981B1

    公开(公告)日:2003-08-05

    申请号:US09348144

    申请日:1999-07-06

    IPC分类号: H04B138

    摘要: A device for locally shielding or blocking a user from close proximity electromagnetic fields emitted by a wireless transmit/receive electronic equipment antenna 22 such as a cellular telephone. The device includes a wearable garments such as a baseball cap 10, electronic carrying pouch 110, fan 210, 250, 410, eyeglass 610, or screens, joined with having EMI/RFI material properties that is specifically worn by the user or placed between the user and the electromagnetic field emanating wireless antenna source 22. It serves to provide as a electromagnetic field shield, either reflective, absorptive, or dissipative behavior in nature, from an direct line-of-sight electromagnetic field radiating from a wireless device antenna 22. The effective shielding area is determined by the shielding device dimensions, the direct line-of-sight electromagnetic field signal antenna transmission behavior and the placement of the shielding device located between the user local human body sensitive tissue area and the wireless transmit/receive electronic equipment antenna 22, as solutions for opened-form design method shielding which serves to minimize the shielding degradation effects and sensitivity interaction effects on normal non-blocked electromagnetic fields antenna signal transmission operation.

    摘要翻译: 用于从无线发射/接收电子设备天线22(例如蜂窝电话)发射的近距离电磁场中本地屏蔽或阻挡用户的装置。 该装置包括诸如棒球帽10,电子携带袋110,风扇210,250,410,眼镜610或屏幕的可穿戴的服装,其具有由使用者特别佩戴或放置在用户手中的EMI / RFI材料特性 用户和发射无线天线源22的电磁场。它用于从无线设备天线22辐射的直接视距电磁场提供本质上是反射,吸收或消散行为的电磁场屏蔽。 有效屏蔽区域由屏蔽装置尺寸,直接视线电磁场信号天线传输行为和位于用户当地人体敏感组织区域与无线发射/接收电子设备之间的屏蔽装置的放置决定 天线22作为用于开放形式设计方法屏蔽的解决方案,其用于最小化屏蔽劣化效应和灵敏度 正常无阻塞电磁场对天线信号传输的影响。

    Device for radiation shielding wireless transmit/receive electronic equipment such as cellular telephones from close proximity direct line-of-sight electromagnetic fields
    8.
    发明授权
    Device for radiation shielding wireless transmit/receive electronic equipment such as cellular telephones from close proximity direct line-of-sight electromagnetic fields 失效
    用于辐射屏蔽的设备,用于从近距离的直接视线电磁场无线发射/接收诸如蜂窝电话的电子设备

    公开(公告)号:US06947764B2

    公开(公告)日:2005-09-20

    申请号:US10292277

    申请日:2002-11-13

    IPC分类号: H04B1/38 H04M1/00

    摘要: A device for locally shielding or blocking a user from close proximity electromagnetic fields emitted by a wireless transmit/receive electronic equipment antenna 22 such as a cellular telephone. The device includes a wearable garments such as a baseball cap 10, electronic carrying pouch 110, fan 210, 250, 410, eyeglass 610, or screens, joined with having EMI/RFI material properties that is specifically worn by the user or placed between the user and the electromagnetic field emanating wireless antenna source 22. It serves to provide as a electromagnetic field shield, either reflective, absorptive, or dissipative behavior in nature, from an direct line-of-sight electromagnetic field radiating from a wireless device antenna 22. The effective shielding area is determined by the shielding device dimensions, the direct line-of-sight electromagnetic field signal antenna transmission behavior and the placement of the shielding device located between the user local human body sensitive tissue area and the wireless transmit/receive electronic equipment antenna 22, as solutions for opened-form design method shielding which serves to minimize the shielding degradation effects and sensitivity interaction effects on normal non-blocked electromagnetic fields antenna signal transmission operation.

    摘要翻译: 用于从无线发射/接收电子设备天线22(例如蜂窝电话)发射的近距离电磁场中本地屏蔽或阻挡用户的装置。 该装置包括诸如棒球帽10,电子携带袋110,风扇210,250,410,眼镜610或屏幕的可穿戴的服装,其具有由使用者特别佩戴或放置在用户手中的EMI / RFI材料特性 用户和发出无线天线源22的电磁场。 它用于从无线设备天线22辐射的直接视线电磁场提供作为电磁场屏蔽的反射,吸收或消散行为。 有效屏蔽区域由屏蔽装置尺寸,直接视线电磁场信号天线传输行为和位于用户当地人体敏感组织区域与无线发射/接收电子设备之间的屏蔽装置的放置决定 天线22作为开放式设计方法屏蔽的解决方案,其用于最小化对正常非阻塞电磁场天线信号传输操作的屏蔽劣化效应和灵敏度相互作用影响。

    Close-proximity radiation detection device for determining radiation shielding device effectiveness and a method therefor
    9.
    发明授权
    Close-proximity radiation detection device for determining radiation shielding device effectiveness and a method therefor 有权
    用于确定辐射屏蔽装置有效性的近距离辐射检测装置及其方法

    公开(公告)号:US06492957B2

    公开(公告)日:2002-12-10

    申请号:US09740071

    申请日:2000-12-18

    IPC分类号: H01Q124

    CPC分类号: H01Q1/245 H01Q1/273 H01Q9/285

    摘要: A radiation detection device for locally detecting radiation of RF energy emissions from close proximity direct line-of-sight electromagnetic fields emitted by a wireless transmit/receive electronic equipment antenna 22 or body 21 such as a cellular telephone, in miniature/planar design form with suitable embedding form-factoring fashioned arrangement capability joined with radiation shielding devices. Said radiation detection device operates without prerequisite need for a battery or external power source, operationally self-powered by the embodiments of this invention when exposed to electromagnetic field radiation of predetermined thresholding energy level setting for the user's own personal alerting verification and assessment means of suitable predetermined radiation detection measurement tester coupling to radiation shielding devices to encompass an overall shield effectiveness system solution in real-time monitoring response fashion operation.

    摘要翻译: 一种放射线检测装置,用于以微型/平面设计形式本地检测由无线发射/接收电子设备天线22或诸如蜂窝电话的本体21发射的近距离直接视距电磁场的RF能量发射的辐射, 与辐射屏蔽装置相结合的合适的嵌入形状因子排列能力。 所述辐射检测装置在没有电池或外部电源的先决条件的情况下工作,在暴露于用于用户自己的个人警报验证和适当的评估装置的预定阈值能级设置的电磁场辐射的情况下由本发明的实施例可操作地自供电 耦合到辐射屏蔽装置的预定辐射检测测量测试仪,以涵盖实时监测响应时尚操作的整体屏蔽效能系统解决方案。